Rail Road Flat, CA climate
Rail Road Flat has mild winters and warm summers. A typical July afternoon reaches 91°, a January night drops to 37°, and about 4 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Rail Road Flat feels like
Winter
Spring
Summer
Fall
Rail Road Flat weather by month
Average highs, lows, rain and snow for every month, from NOAA’s 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 54° | 37° | 7.3" | 0.1" | 10 | 0 | 40° – 53° |
| February | 56° | 37° | 6.8" | 1.7" | 10 | 0 | 39° – 55° |
| March | 60° | 39° | 6.4" | 1.5" | 9 | 0 | 40° – 58° |
| April | 65° | 41° | 3.6" | 0 | 6 | 0 | 46° – 58° |
| May | 73° | 48° | 2.1" | 0 | 6 | 0 | 50° – 70° |
| June | 83° | 55° | 0.5" | 0 | 1 | 0 | 62° – 75° |
| July | 91° | 62° | 0.0" | 0 | 0 | 0 | 72° – 81° |
| August | 91° | 61° | 0.0" | 0 | 0 | 0 | 71° – 80° |
| September | 85° | 57° | 0.3" | 0 | 1 | 0 | 66° – 76° |
| October | 74° | 49° | 2.2" | 0 | 3 | 0 | 57° – 70° |
| November | 61° | 41° | 4.1" | 0 | 6 | 0 | 41° – 57° |
| December | 52° | 36° | 7.1" | 0.4" | 9 | 0 | 40° – 51° |
| Year | 70° | 47° | 40.5" | 3.7" | 63 | 1 |
“Wet days” have at least 0.01" of rain or melted snow. “Snow on ground” counts days with 1" or more. The 30-year range is the coldest and warmest that month’s average temperature got between 1991 and 2020.
Rain and snow in Rail Road Flat
Rail Road Flat gets 41 inches of rain and melted snow a year. January is the wettest month and July the driest. Rain or snow falls on about 63 days a year.
About 285 frost-free days a year
In half of years the last 32° night comes by March 4 and the first one by December 11. That leaves about 285 frost-free days for gardens, longer than 94% of U.S. towns.
Heating and cooling a home in Rail Road Flat
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Rail Road Flat, 67% of that work is heating and 33% is cooling.
Degree days measure how far each day’s average temperature falls below or rises above 65°, added up over a year. Source: NOAA station normals.
Rail Road Flat and its neighbors
Rail Road Flat borders 2 towns with climate data. January nights across them vary by 2.8°. Wilseyville has the coldest January nights (34°) and Glencoe the hottest July afternoons (91°). Rail Road Flat’s January low is 37° and its July high 91°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How Rail Road Flat compares
Compared with every U.S. town and city on TownTapestry, each counted once.
Warmer than it used to be
The last 30 years in Rail Road Flat averaged 0.8° warmer than the 1900s. The biggest change is in September (+1.4°). The shift is smaller than in 87% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Rail Road Flat’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. May swings the most: between 1991 and 2020 its average temperature ranged from 50° to 70°. August is the most reliable, staying within 9°.
Common questions about Rail Road Flat’s climate
What is the coldest month in Rail Road Flat?
December, with a typical high of 52° and a low of 36°.
What is the hottest month in Rail Road Flat?
July, with a typical high of 91° and a low of 62°. About 75 days a year reach 90°.
How much snow does Rail Road Flat get?
About 4 inches in a normal winter, most of it in February.
When is the first frost in Rail Road Flat?
In half of years the first 32° night comes by December 11, and the last spring frost by March 4.
What is the rainiest month in Rail Road Flat?
January, with 7.3 inches of rain and melted snow. The year totals 41 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Rail Road Flat itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at West Pt, CA (3 mi, snow) and Sutter Hill Cdf, CA (14 mi, frost, heat and degree days). Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.